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Controls were frequency matched with cases by sex and age (5-year strata), aged 20-74 years, selected from the NL population using random digit dialing (RDD).
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This was between 24% and 39% lower than the OPC-rates of the stratum aged 85+ living in medium/larger municipalities.
The Swedish weighting was based on the variables geographical strata, age and gender, giving 360 weight groups (60 geographic strata × 3 age categories × 2 gender categories).
We divided data into three age strata (age 17 50, 51 65, and >65 years).
We calculated rates in three age strata: age 65 74, 75 84, and 85 years and older.
Participants in this study are only representative of the source population within matching strata (age, sex, and area of residence), which limits the generalizability of the results.
The study cohort was divided into age strata based on age qualification for Medicare.
The study cohort was split into age strata based on age qualifications for Medicare.
Secondary strata Ethnicity, gender Primary strata Age Secondary strata.
The model contained terms for stratum, age of the respondent, and treatment arm.
All seventeen cases from the upper age stratum (ages 11-24 years) were confirmed incident DKA cases, while 7 of 10 cases from the lower age stratum (ages 10 and below) were so confirmed.
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CEO of Professional Science Editing for Scientists @ prosciediting.com